Cas 139722-37-5,2H-1-Benzopyran-2-one, 4-(2-hydroxyphenoxy)-3-nitro-

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Check Digit Verification of cas no

The CAS Registry Mumber 139722-37-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,7,2 and 2 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 139722-37:
(8*1)+(7*3)+(6*9)+(5*7)+(4*2)+(3*2)+(2*3)+(1*7)=145
145 % 10 = 5
So 139722-37-5 is a valid CAS Registry Number.

139722-37-5Upstream product

139722-44-4 C₁₅H₉NO₆*C₆H₁₅N

139722-37-5Downstream Products

139722-37-5Relevant academic research and scientific papers

Anionic spirocyclization of 3-nitro-4-(2-hydroxyphenoxy)-2H-1-benzopyran-2-one: Formation of stabilized Meisenheimer-type salts

Drozd,Knyazev,Nam,Yufit,Struchkov Yu.,Stankevich,Chistyakov,Lezina,Mozhaeva Ya.,Saveljev

, p. 469 - 480 (2007/10/02)

The interaction of 3-nitro- and 3,6-dinitro-4-(2-hydroxy-4,5-R2-phenoxy)-2H-1-benzopyran-2-ones 4a-d with triethylamine leads to the formation of triethylammonium salts of corresponding anionic spirocyclic compounds 5a-d as a result of intramol

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